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diff --git a/toolkit/crashreporter/google-breakpad/src/processor/basic_code_modules.cc b/toolkit/crashreporter/google-breakpad/src/processor/basic_code_modules.cc
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+// Copyright (c) 2006, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// basic_code_modules.cc: Contains all of the CodeModule objects that
+// were loaded into a single process.
+//
+// See basic_code_modules.h for documentation.
+//
+// Author: Mark Mentovai
+
+#include "processor/basic_code_modules.h"
+
+#include <assert.h>
+
+#include <vector>
+
+#include "google_breakpad/processor/code_module.h"
+#include "processor/linked_ptr.h"
+#include "processor/logging.h"
+#include "processor/range_map-inl.h"
+
+namespace google_breakpad {
+
+using std::vector;
+
+BasicCodeModules::BasicCodeModules(const CodeModules* that,
+                                   MergeRangeStrategy strategy)
+    : main_address_(0), map_() {
+  BPLOG_IF(ERROR, !that) << "BasicCodeModules::BasicCodeModules requires "
+                            "|that|";
+  assert(that);
+
+  map_.SetMergeStrategy(strategy);
+
+  const CodeModule *main_module = that->GetMainModule();
+  if (main_module)
+    main_address_ = main_module->base_address();
+
+  unsigned int count = that->module_count();
+  for (unsigned int i = 0; i < count; ++i) {
+    // Make a copy of the module and insert it into the map.  Use
+    // GetModuleAtIndex because ordering is unimportant when slurping the
+    // entire list, and GetModuleAtIndex may be faster than
+    // GetModuleAtSequence.
+    linked_ptr<const CodeModule> module(that->GetModuleAtIndex(i)->Copy());
+    if (!map_.StoreRange(module->base_address(), module->size(), module)) {
+      BPLOG(ERROR) << "Module " << module->code_file()
+                   << " could not be stored";
+    }
+  }
+
+  // Report modules with shrunk ranges.
+  for (unsigned int i = 0; i < count; ++i) {
+    linked_ptr<const CodeModule> module(that->GetModuleAtIndex(i)->Copy());
+    uint64_t delta = 0;
+    if (map_.RetrieveRange(module->base_address() + module->size() - 1,
+                           &module, NULL /* base */, &delta, NULL /* size */) &&
+        delta > 0) {
+      BPLOG(INFO) << "The range for module " << module->code_file()
+                  << " was shrunk down by " << HexString(delta) << " bytes.";
+      linked_ptr<CodeModule> shrunk_range_module(module->Copy());
+      shrunk_range_module->SetShrinkDownDelta(delta);
+      shrunk_range_modules_.push_back(shrunk_range_module);
+    }
+  }
+
+  // TODO(ivanpe): Report modules with conflicting ranges.  The list of such
+  // modules should be copied from |that|.
+}
+
+BasicCodeModules::BasicCodeModules() : main_address_(0), map_() { }
+
+BasicCodeModules::~BasicCodeModules() {
+}
+
+unsigned int BasicCodeModules::module_count() const {
+  return map_.GetCount();
+}
+
+const CodeModule* BasicCodeModules::GetModuleForAddress(
+    uint64_t address) const {
+  linked_ptr<const CodeModule> module;
+  if (!map_.RetrieveRange(address, &module, NULL /* base */, NULL /* delta */,
+                          NULL /* size */)) {
+    BPLOG(INFO) << "No module at " << HexString(address);
+    return NULL;
+  }
+
+  return module.get();
+}
+
+const CodeModule* BasicCodeModules::GetMainModule() const {
+  return GetModuleForAddress(main_address_);
+}
+
+const CodeModule* BasicCodeModules::GetModuleAtSequence(
+    unsigned int sequence) const {
+  linked_ptr<const CodeModule> module;
+  if (!map_.RetrieveRangeAtIndex(sequence, &module, NULL /* base */,
+                                 NULL /* delta */, NULL /* size */)) {
+    BPLOG(ERROR) << "RetrieveRangeAtIndex failed for sequence " << sequence;
+    return NULL;
+  }
+
+  return module.get();
+}
+
+const CodeModule* BasicCodeModules::GetModuleAtIndex(
+    unsigned int index) const {
+  // This class stores everything in a RangeMap, without any more-efficient
+  // way to walk the list of CodeModule objects.  Implement GetModuleAtIndex
+  // using GetModuleAtSequence, which meets all of the requirements, and
+  // in addition, guarantees ordering.
+  return GetModuleAtSequence(index);
+}
+
+const CodeModules* BasicCodeModules::Copy() const {
+  return new BasicCodeModules(this, map_.GetMergeStrategy());
+}
+
+vector<linked_ptr<const CodeModule> >
+BasicCodeModules::GetShrunkRangeModules() const {
+  return shrunk_range_modules_;
+}
+
+}  // namespace google_breakpad